
Trans Mountain pipeline expansion (TMX) entered partial operation in May, years behind schedule and at more than four times the original cost.
TMX has had to raise tolls to recoup some costs. The shippers are disputing the rate increase.
In April, the CER approved a request from shippers to disclose additional detailed cost and expense information.
“The Commission adjusted the timeline proposed by the parties, due to the increased volume and complexity of records that must be assessed during this proceeding,” the regulator said in a statement.
(Reporting by Brijesh Patel in Bengaluru Editing by Marguerita Choy)